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B1 中級 英語 3:55 Educational

The science of spiciness - Rose Eveleth

TED-Ed · 4,877,380 回視聴 · 追加日 3週間前

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00:06

Why does your mouth feel like it's on fire

00:08

when you eat a spicy pepper?

00:10

And how do you soothe the burn?

00:12

Why does wasabi make your eyes water?

00:14

And how spicy is the spiciest spice?

00:18

Let's back up a bit.

00:19

First, what is spiciness?

00:21

Even though we often say that something tastes spicy,

00:24

it's not actually a taste,

00:26

like sweet or salty or sour.

00:28

Instead, what's really happening

00:30

is that certain compounds in spicy foods

00:31

activate the type of sensory neurons

00:33

called polymodal nociceptors.

00:36

You have these all over your body,

00:38

including your mouth and nose,

00:40

and they're the same receptors

00:41

that are activated by extreme heat.

00:44

So, when you eat a chili pepper,

00:45

your mouth feels like it's burning

00:47

because your brain actually thinks it's burning.

00:50

The opposite happens when you eat something

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